Product Description
Description
MSA438 frequency range from 50kHz to 3.3GHz, it is a key instrument of EMI measurement. Since it has functions such as PK detection, QP detection, AV detection and RBW 9kHz/120kHz (6dB), it enables the radiated emission measurement and the conducted emission measurement for pre-compliance. Furthermore, the magnetic field probe CP-2S (option) finds out the source of disturbance noise.
Measurement mode and Preset
Three measurement modes shown below are available. The troublesome setting for EMI test is unnecessary because the parameters corresponding to the measurement mode are automatically preset.
Detection mode
MSA438E has three detection modes of PK (peak), QP (quasi-peak) and AV (average). As for the datection level, the relational expression of PK≧QP≧ AV is valid as shown in the figure below. Additionally, PK=QP=AV is correct in case of a narrowband signal like CW wave.
The PK detection is achieved by setting the measurement mode to normal measurement, the detection mode to positive peak and the calculation function to MaxHold. By the way, a signal of time width 200ns or more is detected by positive peak detector because the sampling speed of A/D converter is 5MS/s. When observing a disturbance noise, the PK detection enables the fast sweep because its time constant is much smaller than QP or AV. Therefore, it is convenient to use the PK detection when narrowing the disturbance noise spectrums out of specification down to small number.
The QP detection is usually used in both of the radiated and conducted emission measurements, and the AV detection is usually used in the conducted emission measurement. The measurement time is shortened if they are finally used only for the measurement of the spectrums narrowed down by the PK detection.
Resolution bandwidth (RBW)
CISPR provides that the radiated and conducted emissions should be measured with RBW filters of 9kHz and 120kHz respectively. The bandwidth is defined as 6dB width. MSA438E also has five RBW filters besides these two filters, whose bandwidths at 3dB are 3kHz, 30kHz, 300kHz, 1MHz and 3MHz.
Horizontal axis data of 1001 points
Although the spectrum is displayed by 501 points on the horizontal axis of the screen of MSA438E, it is captured by 1001 points per sweep in the instrument. All of these 1001 points are transferred to a personal computer and
displayed on the PC screen after processed by PC software MAS430. The image, therefore, becomes clearer.
Comparison:
The best-seller model MSA300 series was extremely upgraded to MSA400 series as shown in “Comparison between MSA300 and MSA400 series” table. However, the weight and dimensions are almost same, and the price was suppressed as low as possible.
MSA438 frequency range from 50kHz to 3.3GHz, The most popular model. Suitable for cellular phone, 2.4GHz wireless LAN, 2.5GHz WiMAX, RF-ID and Broadcasting.
| Item |
MSA300 series |
MSA400 series |
| LCD |
mono 4.7 inch |
color 5.7 inch |
| 320 x 240 dots |
640 x 480 dots |
| Battery operation |
2.5 hour, Ni-MH |
4 hour, Lithium-ion |
| remainder display |
Not displayed |
Displayed at 5 levels |
| charging indicator |
Not indicated |
Indicated by two colors LED |
| Communication |
RS-232C |
USB (B terminal) |
| External memory |
No |
USB (A terminal) |
| Display dynamic range |
80dB/8div |
100dB/10div |
| Spectrum data points |
251(H) x 201(V) |
501(H) x 381(V) |
| Display scale |
2, 10dB/div |
2, 5, 10dB/div |
| Average noise level |
-117dBm |
-127dBm |
| Freq. setting resolution |
100kHz |
20kHz |
| External trigger |
No |
Yes |
| RF input connector |
SMA(J) |
N(J) |
| Number of save data |
100 |
200 |
| Date storage format |
original |
BMP,CSV |
| Label and file name |
No |
16 characters max @ label |
| Protection bumper |
No |
Yes |
| Removing battery cover |
By screwdriver |
By hand |
Product Features:
Compact and lightweight 1.8kg
The dimensions are as small as 162(W)×71(H)×265(D)mm, and the weight is only 1.8kg including the battery.
It is very convenient for outdoor use and on business trip.
Large and color TFT display
5.7 inches, 640×480 dots and color LCD
Four hours battery operation
Lithium-ion battery enables about four-hour battery operation.
USB memory
USB memory can be used as a removable storage. The screen image is stored by BMP format,
and the spectrum and the setting parameters are stored by CSV format.
USB communication
Such fast transfer rate as 12Mbps maximum was achieved by adoption of USB interface.
Accrate frequency measurement by PLL synthesizer
The center frequency is accurately set by PLL (Phase Locked Loop) synthesizer.
Moreover, the frequency counter (factory option) enables to measure the frequency of the signal more accurately.
Average noise level -127dBm
The low average noise level of -127dBm @1GHz provides a wide dynamic range.
100dB display dynamic range
As the display scale in the amplitude axis is 100dB/10div, the signal is observed in a wide dynamic range.
Easy operation by AUTO mode
- Auto range operation: RBW, VBW and sweep time are automatically selected based on the frequency span.
- Auto tuning operation: The center frequency is adjusted to the maximum level within full span, and the optimum RBW, VBW and sweep time are chosen.
Competitive functions
- Measuring functions: Channel power, Adjacent channel power, Occupied bandwidth, Electric field strength, Magnetic field strength and Frequency measurement.
- Calculation functions: Max hold, Min hold, Averaging, Over write
- Marker measurement and peak search function
- Save/Load function
- Hard copy with printer
Abundant options
A lot of options such as PC software, Logging software, VSWR bridge, Dipole antenna, Magnetic field probe,
USB printer, Frequency counter, Lithium-ion battery and Test accessories are available.
Front view
Side view
Products Specification:
| Frequency section |
| Frequency range |
50kHz to 3.3GHz (MSA438/438TG/438E) |
|
50kHz to 8.5GHz (MSA458) |
| Center frequency |
|
| Setting resolution |
20kHz |
|
Allows rotary encoder, numeric key and function key |
| Accuracy |
±(30+20T)kHz±1 dot @ Span ≦10MHz, RBW3kHz, ※1 |
|
±(60+300T)kHz±1 dot @ Span ≧20MHz, RBW100kHz, ※1 |
| RBW freq. error |
±4kHz @ 3kHz,10kHz, 30kHz |
|
RBW±20% @ 100kHz, 300kHz |
|
RBW±10% @ 1MHz, 3MHz |
| Frequency span |
|
| Setting range |
〈MSA438/438TG/438E〉0Hz (zero span), 200kHz to 2GHz (1-2-5 step) and 3.3GHz (full span) |
|
〈MSA458〉0Hz (zero span), 200kHz to 5GHz (1-2-5 step) and 8.5GHz (full span) |
| Accuracy |
±3%±1 dot @ one step slower sweep time than AUTO,※1 |
| Display dots |
501dots＠ LCD screen, 1001dots @ USB communication ※1001 dots are captured in the unit. |
| Rosolution bandwidth |
3dB bandwidth |
| Setting range |
〈MSA438/458/438TG〉3kHz to 3MHz (1-3 step) and AUTO |
|
〈MSA438E〉3k, 9k (6dB), 30k, 120k (6dB), 300k, 1M, 3MHz and AUTO |
| Accuracy |
±20% |
| Selectivity |
1：12 (typical) @ 3dB:60dB |
| Video bandwidth |
100Hz to 1MHz (1-3 step) and AUTO |
| SSB phase noise |
-90dBc/Hz (typical) @ 100kHz offset, RBW 3kHz, VBW100Hz, sweep time 1s |
| Spurious response |
less than -60dBc |
| Harmonics |
less than -40dBc @ ≧100MHz |
| Amplitude section |
| Reference level |
|
| Setting range |
+10 to -60dBm, 1dB step |
| Accuracy |
±0.8dB±1 dot @ CF100MHz, RBW3MHz, VBW 1MHz, REF -15dBm, ※1 |
| Unit |
dBm, dBV, dBmV, dBμV, dBμV/m, dBμA/m |
| Average noise level |
-127dBm (typical) @ 1GHz |
| Frequency characteristics |
s ±2.0dB±1 dot @ ＜100MHz |
|
±1.0dB±1 dot @ ≧100MHz |
| Input impedance |
50Ω |
| Input VSWR |
less than 2.0 |
| Input attenuator |
|
| Operating range |
0 to 25dB (1dB step), coupled with reference level |
| Switching error |
±0.6dB @ 100MHz |
| RBW switching error |
±0.6dB |
| Display scale |
|
| Display dots |
381 dots/10div |
| Scale |
2dB/div, 5dB/div, 10dB/div |
| Accuracy |
±(0.2dB+1 dot)/2dB ±(0.4dB+1 dot)/5dB |
|
±(0.8dB+1 dot)/10dB ±(1.8dB+1 dot)/83dB |
| Input damage level |
+27dBm(CW average power), 25VDC |
| Input connector |
N(J) connector |
| Sweep section |
| Sweep time |
|
| Setting range |
10ms to 30s (1-3 step, Span 0 to 2GHz) and AUTO |
|
30ms to 30s(1-3 step, Span 5GHz @ MSA458 and full) and |
| AUTO |
|
| Accuracy |
±0.1%±1 dot @ Span 0 to 5GHz |
|
±2.5%±1 dot @ Full span |
| Trigger |
Available only for zero span |
| Trigger mode |
AUTO |
| Trigger source |
Internal and External |
| External trigger |
|
| Voltage range |
1 to 10Vp-p |
| Frequency range |
DC to 5MHz |
| Input coupling |
DC coupling |
| Trigger level |
approx. 0.56V (fix) |
| Input RC |
approx.10kΩ// less than 15pF |
| Input damage level |
±50V (DC+ACpeak) |
| Input connector |
SMA(J) connector |
| Detection mode |
Positive peak, Negative peak, Sample |
|
T : sweep time (s), ※1 : 23±5℃、less than 28℃/70%RH |
| Functions |
| Marker measurement |
NORM : displays frequency (8digits max) and level (4digits max), at marker point. |
|
DELTA : displays frequency difference and level difference between two markers. |
| Peak search function |
Searches for peak level within all of 10 div (NORM mode) or within ZONE specified (ZONE mode) and displays frequency and level at peak level, and moreover NEXT peak at NORM mode. |
| Calculation function |
NORM, MAX HOLD, MIN HOLD, AVERAGE, OVER WRITE, Number of sweeps is 2 to 1024 (power of 2 ) and infinite. Measuring function Channel power, Adjacent channel power, Occupied bandwidth, Electric field strength (needs optional dipole antenna), Magnetic field strength (needs optional magnetic field probe) and Frequency counter (factory option) Auto tuning When pressing AUTO TUNE key, the spectrum of maximum level within full span is adjusted to center, and reference level, RBW, VBW and sweep time are set to optimum parameters. |
| Save/ Load |
Saves 200 spectrums and 200 setting parameters. |
| General |
| Communication |
|
| Interface |
Corresponding to USB 2.0 |
| Connector |
B plug (device) |
| Transfer rate |
Full speed (12Mbps) |
| Hard copy |
USB printer (option) connected to A plug (host) eanbles hard copy of screen |
| USB memory |
Uses A plug (host), and stores spectrum data, setting parameters and spectrum data + setting parameters. |
| Screen |
|
| Display |
5.7 inches and color LCD |
| Backlight |
LED backlight |
| Number of dots |
640(H)×480(V) dots |
| Power supply |
|
| Kind of power supply |
External DC source (by dedicated AC adaptor MA400) and Lithium-ion battery (by optional MB400) |
| Dedicated AC adaptor |
Input : 100 to 240 VAC |
|
Output : 9VDC/2.6A |
| Lithium-ion battery |
7.4V/5000mAh |
| Charge function |
Capable of charging during power-off. Indicates 4 conditions with two colors LED (red and green). |
| Remainder indication |
5 levels indication |
| EMI measurement function (only MSA438E) |
| Detection mode |
PK (peak), QP (quasi peak) and AV(average) detections |
| Rosolution bandwidth |
3kHz, 9kHz (6dB), 30kHz, 120kHz (6dB), 300kHz,1MHz, 3MHz ※3dB bandwidth excluding 9kHz and 120kHz. |
| Time constant of QP |
| EMI measurement function (only MSA438E) |
| Detection mode |
PK (peak), QP (quasi peak) and AV(average) detections |
| Rosolution bandwidth |
3kHz, 9kHz (6dB), 30kHz, 120kHz (6dB), 300kHz,1MHz, 3MHz ※3dB bandwidth excluding 9kHz and 120kHz. |
|
| Other |
| Operating temperature |
0 to 50℃ (guaranteed at 23±10℃ but at 23 ±5℃ as to items with ※1, without carrying case) |
| Operating humidity |
less than 40℃/80%RH (guaranteed at less than 33℃/70%RH but at |
|
less than 28℃/70%RH as to items with ※1, without carrying case) |
| Storage temperature |
-20 to 60℃, less than 60℃/70%RH |
| Dimensions |
162(W)×71(H)×265(D)mm (excluding projections, protection bumper and stand) |
| Weight |
approx. 1.8kg (including battery) |
| Standard accessories |
・AC adaptor MA400 |
|
・Carrying case |
|
・Accessory pouch |
|
・Operation manual |
MSA438E 3.3GHZ Handheld Color Spectrum Analyzer for EMI
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Product Description
Description
MSA438 frequency range from 50kHz to 3.3GHz, it is a key instrument of EMI measurement. Since it has functions such as PK detection, QP detection, AV detection and RBW 9kHz/120kHz (6dB), it enables the radiated emission measurement and the conducted emission measurement for pre-compliance. Furthermore, the magnetic field probe CP-2S (option) finds out the source of disturbance noise.
Measurement mode and Preset
Three measurement modes shown below are available. The troublesome setting for EMI test is unnecessary because the parameters corresponding to the measurement mode are automatically preset.
Detection mode
MSA438E has three detection modes of PK (peak), QP (quasi-peak) and AV (average). As for the datection level, the relational expression of PK≧QP≧ AV is valid as shown in the figure below. Additionally, PK=QP=AV is correct in case of a narrowband signal like CW wave.
The PK detection is achieved by setting the measurement mode to normal measurement, the detection mode to positive peak and the calculation function to MaxHold. By the way, a signal of time width 200ns or more is detected by positive peak detector because the sampling speed of A/D converter is 5MS/s. When observing a disturbance noise, the PK detection enables the fast sweep because its time constant is much smaller than QP or AV. Therefore, it is convenient to use the PK detection when narrowing the disturbance noise spectrums out of specification down to small number.
The QP detection is usually used in both of the radiated and conducted emission measurements, and the AV detection is usually used in the conducted emission measurement. The measurement time is shortened if they are finally used only for the measurement of the spectrums narrowed down by the PK detection.
Resolution bandwidth (RBW)
CISPR provides that the radiated and conducted emissions should be measured with RBW filters of 9kHz and 120kHz respectively. The bandwidth is defined as 6dB width. MSA438E also has five RBW filters besides these two filters, whose bandwidths at 3dB are 3kHz, 30kHz, 300kHz, 1MHz and 3MHz.
Horizontal axis data of 1001 points
Although the spectrum is displayed by 501 points on the horizontal axis of the screen of MSA438E, it is captured by 1001 points per sweep in the instrument. All of these 1001 points are transferred to a personal computer and
displayed on the PC screen after processed by PC software MAS430. The image, therefore, becomes clearer.
Comparison:
The best-seller model MSA300 series was extremely upgraded to MSA400 series as shown in “Comparison between MSA300 and MSA400 series” table. However, the weight and dimensions are almost same, and the price was suppressed as low as possible.
MSA438 frequency range from 50kHz to 3.3GHz, The most popular model. Suitable for cellular phone, 2.4GHz wireless LAN, 2.5GHz WiMAX, RF-ID and Broadcasting.
Product Features:
Compact and lightweight 1.8kg
The dimensions are as small as 162(W)×71(H)×265(D)mm, and the weight is only 1.8kg including the battery.
It is very convenient for outdoor use and on business trip.
Large and color TFT display
5.7 inches, 640×480 dots and color LCD
Four hours battery operation
Lithium-ion battery enables about four-hour battery operation.
USB memory
USB memory can be used as a removable storage. The screen image is stored by BMP format,
and the spectrum and the setting parameters are stored by CSV format.
USB communication
Such fast transfer rate as 12Mbps maximum was achieved by adoption of USB interface.
Accrate frequency measurement by PLL synthesizer
The center frequency is accurately set by PLL (Phase Locked Loop) synthesizer.
Moreover, the frequency counter (factory option) enables to measure the frequency of the signal more accurately.
Average noise level -127dBm
The low average noise level of -127dBm @1GHz provides a wide dynamic range.
100dB display dynamic range
As the display scale in the amplitude axis is 100dB/10div, the signal is observed in a wide dynamic range.
Easy operation by AUTO mode
Competitive functions
Abundant options
A lot of options such as PC software, Logging software, VSWR bridge, Dipole antenna, Magnetic field probe,
USB printer, Frequency counter, Lithium-ion battery and Test accessories are available.
Front view
Side view
Products Specification:
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